import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login'
import Home from '../components/Home'

Vue.use(VueRouter)

const routes = [
  { path: '/', redirect: '/login' },
  { path: '/login', component: Login },
  { path: '/home', component: Home }
]

const router = new VueRouter({
  routes
})

/* 挂载路由导航守卫 */
router.beforeEach((to, from, next) => {
  // to 将要访问的路径
  // from 代表从哪个路基跳转来
  // next 是一个函数，表示放行   next()直接放行  next('/login')强制跳转

  // 如果访问登录，直接放行
  if (to.path === '/login') return next()

  // 获取token
  const tokenStr = window.sessionStorage.getItem('token')

  // 如果未登录，强制跳转至登录页面，否则放行
  if (!tokenStr) return next('/login')
  next()
})

export default router
